Net Income (Loss) Per Share (Tables)

12 Months Ended

Dec. 31, 2012

Calculation of Net Income (Loss) and Number of Shares Used to Compute Basic and Diluted Earnings Per Share

The calculation of net income (loss) and the number of shares used to compute basic and diluted earnings per share for the years ended December 31, 2012, 2011 and 2010 are as follows:

In thousands	2012			2011			2010
Net income (loss)	$	(220,872	)	$	(123,603	)	$	85,248
Net income (loss) per share – basic	$	(1.34	)	$	(0.93	)	$	0.75
Weighted average shares outstanding – basic		164,964			132,375			113,020
Dilutive stock options		—			—			572
Restricted stock and restricted stock units		—			—			1,142
Weighted average shares outstanding – diluted		164,964			132,375			114,734
Net income (loss) per share – diluted	$	(1.34	)	$	(0.93	)	$	0.74

Potentially Dilutive Securities Excluded in Computation of Net Income (Loss) Per Share

For the years ended December 31, 2012, 2011 and 2010, the following potentially dilutive securities were not included in the computation of net income (loss) per share because the effect would be anti-dilutive:

In thousands	2012		2011		2010
Stock options		8,228		7,381		5,852
Restricted stock and restricted stock units		1,903		2,785		—
Warrants		—		5,806		9,564
		10,131		15,972		15,416